Lifting feed water injector



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LIPTING'FEED WATER INJECTOR.

Patented Apr. 29, 1884.

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No. 297,826. Patented Apr. 29, 1884.

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INVENTOIR: W! 264 Pat ent ed Apr 29, 1884;

'W. MGELROYJ 'LIFTING FEED WATER INJEGTOR.

. I/ll/ (ModeL) By his Attorneys,

- 'VWITNESSES:

UNITED STATES PATENT rica.

WILLIAM MoELROY, or BROOKLYN, NEW YORK.

Ll FTING' FEED-WATER INJECTOR.

SPECIFICATION forming part of Letters Patent No. 297,826, dated April29, 1884.

Application filed December 22, 1882.

2'0 all whom it may concern..-

Be it known that I, :WILLIAM MoELRoY, a citizen of the United States,residing at Brooklyn, Kings county, New York, have invented certainImprovements in Lifting Feed-Water Injectors, of which the following isa specification.

My invention relates to that class of inject-.

ors in which the injector proper is arranged between a water-supply orreservoir at a lower level than the injector, and an ejector, whereby,when the injector is to'be started, the water may be forced up into thebody of the injector by atmospheric pressure created by producing avacuum at the ejector. It is obvious that a vacuum may be created in theinjector.

. ejector automatic by suitable mechanism,

whereby, when the steam is admitted to the injecting apparatus, it firstacts through the ejector to lift the water and fill the body of theinjector. .The steam isthen automatically cut off from the ejector andturned onto the injector to feed the water into the boiler, or intowhatever is to be fed thereby. Should the vacuum break from any causeand the feed stop, the-water from the body of the in-' jector will flowback to its source; but this will instantly-cut off the steam from thein-- jector and turn it on to the ejector, which will cause a repetitionof the act-ion first described and again start the feed.

My invention also relates to means for regulating the admission of steamto the injector proper by means of afloat in the generator or boiler,and also to the regulation of the passages of the injector through thesame medium. These latter are improvements on the device described andshown in my application filed July 13, 1882, and numbered 66,633, whichwas allowed October 19, 1882.

In the drawings which serve to illustrate my present invention, .Figurel is a plan of (Model) my'improved injecting apparatus. Fig. 2 is avertical section of same on line 2 2 in Figs. .1 and 4. Fig. S'is asectional elevation, the sectional portion being cut in the plane ofline 8 3 in Figs. 1,4, and 6. Fig. 4 is ahorizontal section or sectionalplan taken substantially on line 4 4 in Figs. 2 and 3. Fig. 5 is adetached vertical midsection of the ejector, taken on line 5 5 in Figs.1 and 3. Fig. 6 is a detached sectional View illustrating the automaticcut-off or two-way steamvalve, the section being taken in the plane ofline 6 6 in Figs. 1 and 4. Figs. 7 and 8 are respectively across-section and longitudinal section of the rear or butt of theinjector, de-.

before referred to, I have shown and de-..

scribed a mechanism whereby a float in the steam-generator, or in achamber connected therewith, is arranged to act upon the splndle andcone of the injector in such a manner that as the float rises it reducesthe size of the steam and water passages in the injector, andeventually, when the water reaches the proper level in the generator,the steam is entirely out off from the injector. for this purpose in mypresent application; but I do not claim them, broadly, herein. So far asthe present application relates to these features, I claim only theparticular means herein described for accomplishing the desired result.I

A represents the tubular shell of the injector proper. Y

B is a float-chamber, connected, by preference, wit-h theinjector-shell, as shown, and communicating with the water-space of theboiler or generator by a pipe, at, and with the steam-space of thegenerator by a pipe, 12, both of which may be provided with controllingcocks.

.0 is a float, mounted in thechamber B on guides c c, and connectedadjustably with a float-stem, d. The lower end of this float- 5 I haveshown devices the cylinder 7;,- and I have shown the pipe a stem iscoupled to a link, 0, which is coupled to an arm, f, on aroek-shaft, 1,(seeFig. 4,)which has suitable bearings in the base of the floatchamberB. The shaft r extends out from the chamber through a packing-gland andbears on its outer extremity an arm or crank, 71, (see Fig. 3,) which iscoupled by a link with the stem z of the injector-spindle, which projects from the base of theinjector-shell through a packed gland. Thus theplay of the float 0 up and down is caused to impart a longitudinalmotion to the injector-spindle. The float-chamberis provided with a key,D, which passes through a stuffing-box in the top of the chamber, andhas a square socket to takeover a square of] the end of the float-stem,whereby the stem may be turned and the float be readily adjusted up ordown on the stem which screws into the said float.

E in Fig. 1 represents the boiler or generator. On the upper end ofthestem ofthe float C is mounted a valve, which, when the float has risento a predetermined height, will cut off the supply of steam to theinjector.

In my pending application I showed a coneshaped valve on the stemarranged to seat it self by the rising of the float. In my presentapplication Ishow acylindenvalvaj, mounted on the stem, and arranged toplay in a cylindrical portion, k, of the float-chamber. The steam-pipeZ, which leads to the injector, taps from the boiler as also connectedwith it, but this is not essential. Indeed, in some cases I shouldprefer to have the pipe (4 enter the main portion of the float-chamberabove the water-line therein. As the valve j is moved upward by therising of the float, it eventually closes the mouth of pipcl, as will=bewell understood. The steam has free passage through the cylinder-valvej, necessarily, in this construction.

The interior mechanism of the injector will now be described withespecial reference to Figs. 4, 7, 8, 9, and 10.

The shell A ofthe injector is provided with an extension, at, in whichis mounted a checkvalve, 11 The pipe 0, which leads the feedwater to theboiler, is coupled to this extension m. The cone 1) of the injector isshown in cross-section in Figs. 9 and 10. This cone has a flange, q,near its upper end, which rests on an internal flange, (1, on the shellA, being drawn up tightly by means of a screw-threaded tube, 1', whichscrews through a diaphragmflange, q", in the shell. F is the spindle ofthe injector, to which is secured the stem 1', before mentioned. Thespindle F has a prolonged tip, which passes through tube 9", and issteadied by a three-armed guide, 8, secured onto tube 1'. A tubularshell, 25, screws onto the butt of the spindle F, and has a coned orbeveled month, which is arranged to fit the mouth of the cone 1) at itsbase, whereby,when the spindle is advanced into the cone by the rise offloat B, this coned face of the tubular shell will advance toward themouth of the cone 1; and reduce the size of the water-pas sage. Thewater enters the shell A (in a way that will be hereinafter explained)between said shell and cone 1;, and passes back exteriorly of cone 1) toits base, where it enters the base of said cone at the passage marked uin Fig. 4. Should any water flow back or be crowded back from thecheek-valve a through the tube 1', or collect in the chamber around themouth of the cone 1), it will pass through passages or bores o r in thecone 1), (see Figs. 4 and 9,) and find its way into the cone atapertures w w.

In order that the spindle F and shell 23 may not move with the samespeed, which is sometimes a desirable arrangement, I may provide theconstruction shown in Figs. 7 and 8that is to say, I may make the screwwhich connects the shell 2! with the spindle F with a steep pitch, andprovide the exterior face of the shell 25 with an oblique cam-slot, :0,arranged to engage the tip of a pin or screw, y, fixed in the shell A.Thus when the spindle F is advanced longitudinally, the slot 00 willengage the screw 9 and turn the shell 15 part way round, thus causingthe screw to move it lengthwise at a diflerent speed from that of thespindle. I may or may not employ this device.

I will now describe the ejector G, which is connected with the shell ofthe injector by means of a pipe or tubular connection, 2.

Referring particularly to Fig. 5, a is the she1l,of the ejector, and bthe outlet or overflow pipe leading to the water-tank or well. H is thesteampipe which supplies the ej cctor. c is the spindle; d,theperforated tubular shell surrounding the spindle, and c is a checkvalvearranged between the injector and ejector and upheld by a spring. I haveshown the ejector as in operation in Fig. 5, the water from the injectorfollowing the direction of the arrows, and the valve 0 off its seat.\Vhen the inj ector is operating, the valve 0 closes and prevents theentrance of air to the injector. I have shown the ejector as dischargingupward, and the valve 0 normally upheld by aspring; but I may invert theejector so that it will discharge downward and allow the valve 0 toclose normally by gravity. The tubular shell cl forms a part of thescrew-cap or plug that closes the bottom of the shell a, and the spindlec is screwed into this. There is a beveled or coned shoulder on theshell (1, which, when the cap is screwed in, fits tightly into asimilarly-formed seat,f,on the interior of shell a. The tubularconnection 2 of the ejector taps the shell of the injector between theflanges q q in the shell of the latter,whieh, as will be seen, Fig. 4,form a chamber in the injector, which is not open to the space exteriorto the cone 1), but open to the interior of said cone. Consequently,water which enters the injector-shell exterior to the cone p must passback and through the opening u to reach the interior of the cone, andthrough it the chamber between flanges q From this chamber it may passto the ejector G.

I will now describe the means for admitting water to the injector, andthe means whereby the incoming water acts to automatically supply steamto the injector after cutting it off from the ejector, which is normallyopen to the steam.

I is the float-chamber, which may be situated anywhere, but which I havearranged on and over the injector. This chamber is connected at thebottom with .the water-supply pipe J,

as best seen in Fig. 2. From the top of this chamber a pipe, K, leads tothe injector and taps it, as shown in Fig. 3, just back'of the flange qtherein.

In the chamber I is a float, L, which rises and falls with the rise andfall of the water therein. In order to always leave a free passage forthe water through the chamber, I prefer to make a passage, h, in thefloat, as shown. All the water that enters the injector must passthrough chamber I. The float L is connected to the end of a lever,j,which is mounted (see Fig. 4) on a rock-shaft, 7c,whic-h has hearingsin an enlargement ofthe waterpassage between chamber I and inlet J.

M is a steam-chest,which has a valve-seat, Z, provided with ports m'm,(see Figs.3, 4, and 6,) the former of which leads steam to the injector, and the latter to the ejector through pipe H. The shaft It bearsa disk-valve, n, which rests upon the seat Z, and has a port, o.which,by rotation of the valve, may be brought to coincide or register witheither of the ports m or W. The steam supply pipe Z admits steam to thechest M normally. In Figs. 4: and 6 the port 0 of the valve is shownincoincidence with the port at, and in Fig. 3-it is shown in coincidencewith port m When there is no water in the chamber I and the float Lrests at its lowest point, the valve a is in position to admit steam tothe ejector through the pipe I, the chest M, port m, and pipe H; butwhen the action of the ejector G has produced a vacuum in the injector,and throughout the chamber I and supply-pipe J, as it will do, the waterrises from the reservoir or source through pipe J and chamberI andfillsall parts of the injector, overflowing through the ejector G andback to the source through pipe b. Thus the injector is filled with coldor cool water before any steam enters it. In the passage of the waterthrough chamber I, however, the float L is lifted, and by the time theinjector is filled this upward movement of the float will have shiftedvalve n, cut off steam from the ejector, and admittedit to the injector.The latter will then work and continue to work unless something breaksthe vacuum, when the'water in chamber I will flow back to the source,permit the float to fall, and again admit steam to the ejector, as atfirst.

In order to insure the admission of water to the injector before thefloat L rises high enough portion can pass over through pipe K.

to shift the valve, I prefer to provide a small supplementary pipe, 19,Fig. 3, extending from the lower part of chamber I to the pipe K, or

it may pass directly to the injector, whereby some water may flowthrough before themain This is a precautionary device, and it isdesigned to prevent the steam from entering the injector before thewater fairly reaches it. The pipe K might, however, leave the chamber Iat a lower point than that shown; but I prefer the arrangement of twopipes, as represented, as this insures the retention of the floatat itshighest point while the injector is working with thesteam-port fullyopen to the injector, and yet insures the injector being charged(through pipe 1)) before the port m is opened. This injector requires noattention whatever, except to see that it is in working order. It isentirely automatic, supplying only when the generator needs water, andsetting the ejector in operation and stopping it just as the same mustbe done by hand; indeed, better than it can be done by hand, as iteffectually avoids the admission of steam to the injector, except whenthere is water there.

I do not limit myself to the form of valve or shown. It might be aslide-valve or an oscillating cylindrical valve; or, indeed, any of theknown forms of valve capable of being actuated by a float. The float 0might be arranged inside of the generator, and the lever f and shaft gmight be arranged exteriorly,

the-stem of the float passing outthrough a stuffing-box.

rected to the ejector or injector as needed) to any injector, andentirely omit the float C and its appurtenances for giving motion to theinjector-spindle. In this case the steam-pipe I, provided with asuitable cutoff cock,would lead directly from the generator to thesteanichest M.

In Fig. 11, which is a fragmentary view, I have shown the parts h and iand the end of shaft 9 arranged in a box, 9, which may form a part ofthe float-chamber B and injectorshell A. This box or chamber may have asteanrtight but removable cover, whereby access can be had to theworkingparts. By employing this construction I may dispense with the packing ofthe stem 11 of the injectorspindle, relying only on a close fit, and Imay also dispense with the packing around the shaft where it passes outof chamber 13, 're-' lying to prevent leakageonly on a collar, 1",

on said shaft, ground to fit a seat on the inner face of the wall of thechamber. Indeed, I

,may employ this collar in lieu of the stuffingbox shown in Fig. 4.

Figs. 12,13, and 14 illustate a modified contion of the butt or base ofthe injector; Fig. I or, substantially as and for the 13, the same ofthe cone 1) detached, and Fig. 14 an end view of the cone. The butt ofthe cone is cylindrical in form, and the end of shell t fits and slidestherein, substantially water-tight,- but the cone has triangularrecesses sformed in its interior face, with the points upward, as inFig. 13, whercat the water enters alongside of the shell i. As the shelladvances, however, these water-ways are reduced in area, as will be wellunderstood, and will be cut off entirely when the cylindricalplunger-like shell passes them.

In Fig. 15, which is a fragmentary sectional view of that portion of theinjector adjacent the point where the ejector G is connected with it, Ihave shown a slightly-modified construction in which the tubularscrew-threaded nozzle r is omitted, or rather made in one with the cone1). In this construction the injector exhausts the air wholly throughthe passages o 1), instead of partially through these passages andpartially from the interior of the cone direct. It may be necessary tosay that the cone 1) is steadied in place in the shell A by means ofexterior ribs, 16, as shown in Figs. 9, 10, 13, and 14; and it may alsobe necessary to say that the steam from port at enters the shell 15through a port or aperture in the same, as shown in Fig. 4, so that whenthe said shell is moved forward (together with the spindle F) by theaction of the float O the steam will be gradually throttled or cut off.This was shown in my pending application,and is not herein claimed.

The shell 23 may be made to fit snugly in the injector-shell, or bepacked.

I claim as my invention-- 1. The combination, with the injector, of anejector, a float-chamber arranged between the injector and thewater-source, a pipe or water-conduit leading from the water-source tothe float-chamber, and a pipe leading from said chamber to the injector,a float in said chamberconnected with and arranged to actuate asteam-valve in a steam-chest by its rise and fall, said steam-chestarranged to receive steam from a generator, and said valvearranged tocontrol the admission of steam to the injector and ejector,whereby thepassage of waranged to exhaust the air from and through the injector,whereby the water is caused to rise and fill the injector, and means,substantially as described, whereby the passage of water on its way tothe injector cuts the steam off from the ejectorand admits it to theinjectpurposes set forth.

3. The combination of a float arranged to rise and fall with the riseand fall of the water in a steam-generator, a valve actuated by saidfloat and arranged to stop the passage of steam from the generator to aninjector, the said injector, the steam-chest M and the steampipe leadingthereto, a valve, a,a float-chamber, I, connected with water-source by apipe, J, and with the injector by a pipe, K, a float in said chamber Iarranged to actuate the valve a, and an ejector connected withtheinjector and arranged to exhaust the air therefrom, said valve abeing arranged to control the steam ports and passages leading from thesteam chest to the injector and ejector, respectively, all arranged tooperate substantiall y as set forth.

4:. The ejector comprising the shell a, provided with a coned seat, f,the tubular perforated shell cl,arranged to screw into the bottom of theshell a, and its upper end arranged to rest on the seat f, the axialspindle 0', secured to the shell d, and the check-valve c, all combinedand arranged substantially as set forth.

5. The combination, with the. shell A of the injector provided withinternal flanges, g the cone 1), provided with a flange, q, passages 02o, and apertures 10, the tubular screw 1', guide s, valve a, spindle F,and shell if, all arranged substantially as set forth.

6. The combination, with the shell of the injector, of the spindle F,arranged to play longitudinally therein, the cone 1;, the shell t,screwed onto the base of the cone, and provided with an oblique slot orgroove, 00, and the screw 3/, mounted in the shell of the injector, andarranged to engage said groove 0:, all constructed substantially as andfor the purposes set forth.

7. The combination of the injector proper, the ejector, thefloat-chamber I, water-supply pipe J, pipe K, float L, lever j, shalt7c,valve n, steam-chest M, and steam-pipe I from the generator, and thesteam-pipe H, leading to the ejector, all combined and arranged tooperate substantially as set forth.

8. The chamber [,provided with a main pipe, K, leading from its top tothe injector, and an auxiliary pipe, 1), leading from said chamber at alower point,whereby water is supplied to the injector from said chamberI before the float L rises to its highest point, substantially as setforth.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

lVitnesses: WILLIAM MOELROY.

HENRY CoNNErr, ARTHUR O. FRASER.

